<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.css">
    <link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.min.css">
    <style>
        *{
            width: 700px;
            margin: auto;
        }
        button{
            margin-left: 250px;
        }
    </style>
</head>
<body>
    <h1>添加班级</h1>
    <form method="POST" action="/add_class/ "class="form-group" >
        <div class="form-group">
            <label for="exampleInputEmail1">班级名称</label>
            <input type="text" name="title">
        </div>
            <button type="submit" value="提交" class="btn btn-default col-md-4" >提交 </button><p style="color: red">{{ msg }}</p>

    </form>
</body>
</html>